Door-operating mechanism



Jan. 8, 1929.

. .J. F. PETERSEN DOOR OPERATING MECHANISM Filed July 26, 1927 2 Sheets-Sheet Jan. s, 1929. 1,698,652

J. F. PETERSEN DOOR OPERATIFNG MECHANISM Filed July 26, 1927 2 Sheets-Sheet 2 Patented Jan. 8, 1929.

JOHN F. PETERSEN,

0F BENNINGTON, NEBRASKA, Assreuon To nor r. GORDON, or BENNINGTON, NEBRASKA.- l

DOOR-OPERATNG MECIIANISM.

Application filed July 26, 1927.l Serial No. 268,652. f

The primary object of this invention is to obviate the impact, noise and ar incident to the closing of a door and pro-vides means whereby the door or closure mounted to swing or slide initially moves by a. slow movement` which is accelerated, then gradually reduces as the closure comes torest either in the opening or the closing movement.

The invention provides means for imparting a variable movement to a doo-r, Vor like part, from a prime operator having a 4constant movement, so that the final travel of the door is slow and ceases gently without any perceptible impact or The invention contemplates a prime opera.-

l tor, such as a reversible electric motor, having a constant movement, a reversible switch for controlling the current to the motor, a leverage connection between thel motor and door, or closure, for operating the door by a Vvariable speed whichis initially slow, then accelerated and finally retarded to ceaseV gently and without jar, and tripping means for automatically throwing the switch and cut off the current to the motor as the closure comes to f rest in either direction of its travel.

While the drawings illustrate av preferred embodiment of the invention, it is to be understood that in adapting the means to meet f thereof.

Fora full understanding of the invention and the merit-s thereo-f, reference. is to be had tothe following description and the draw! ings hereto attached, in which,-

Figure 1 is atop plan view of a door operating mechanism embodying the invention, av portion of the structure provided ,with the .door opening being shown in section.

Figure 2 is an elevational view of the jar and the door operating mechanism, the structure in which the door opening is formed being shown in section. l

Figure 3 is a sectionalview on theline 3- of Figure 2, looking upwardly as designated by the arrows and showing the position of the parts when the door is closed.

Figure 4 is a view similar tov Figure 3, showing the relation of the parts when the door is open.

. V.Figure 5 is a detail sectional line 5-.5 of Figure 2. j

Corresponding and like parts are referred to in vthefollowing description and designat-v ed yin theseveral views Vof the drawings by like reference characters.

view` on the The 'numeral 1 designates' a lstructure in which 1s formed a door opening 2 adaptedto be closed by means of a door of any kind, and mounted 1n any usual or determinate way. In'the present instance the structure 1 representspart of a garage or barn, and the dooraway fromvthe leaf 4. Vhen the door is open,

as indicated in F igure 4 of the drawings, the leaf5 is folded against the leaf 4. As theleaf 4 swings from an open into a. closed position the leaf 5 Agraduallymoves away from the leaf 4 and is .directed in itsmovements by a guide 6, and a slide 7 the latter being connected to a rbraoket by meansof a swivel joint, as indicated most clearly in Figure 5. They bracket 8V is attached to the upper outer corner of the leaf 5. The guideG consists of a flat4 bar disposed at the topl of the doory opening 2 and inclines to the plane thereof. rThe slide 7 embraces opposite sides of the Ouide 6, as indicated most clearly'in Figure v5, t ereby positively directing the leaf 5 in its open'- ing and closing movement. Y

The' doorvoperating `mechanism includes similar or like brackets 9, which are attached to the upper ends of the respective leaves 3 and 4. Links 10 are pivotally connected at Y one end to lthe outer ends of the brackets 9 and the opposite4 end is pivoted to the ends of a lever 11 which is pivoted intermediate its ends to turn about a vertical aXis. The

lstructure 1 above the door opening. A worm wheel 16 is fast totheupper end of the vertical shaft 12, andits teeth are in mesh with the worm 17 forming part of a shaft 18 tok which the operating power for opening and closing the door is applied. They operating which is of the reversible type.

power is derived from an electric motor 19 The shaft of the motor19 is connected'to the shaft 18 and each of the shafts is provided with a pulley, power being transmitted by means of a belt 20, which passes around the pulleysapplied to the motor shaft and the shaft 18. It is observed that the, movement of the motor is constant. The motor 19 is included in an electric circuit containing a double throw switch 21 which may be of any conventional type, so long as it serves to reverse the current which is essential to effect an opening and a closing of the door.` The numeral 22 designates the switch operating lever, which eX- tends across the pathof pins 23 projecting from the worm wheel 16. The lever 22 e`X- tends between the pins'23 and moved in one direction by one of said pins and in the oppo-` site direction .by the other one of said pins. The elements 22 and 23 constitute a trip mechanism for automatically throwing the switch whenthe door reaches its eXtreme movement, both ywhen closing and opening. It is observed that the4 motor circuit, in addition to the automatically operated reversing switch 21, includes a circuit closing device, not shown,

whereby the circuit may be closed to start the motor, when itis required to either open Y or close the door.

v increases and in consequence the movement is accelerated,and is greatest when the door reaches va position midway' between its eX- treme positions. After the door passes the midway position the-effective leverage for operating the same decreases and as a result In either extreme movement the final movement of the door is gradually retarded, with the result that when the door reaches the limit of its movement in f either direction the final closing or opening is slow, and gentle, with the result that the door closes without any appreciable impact or jar.v 'i

So far as the nature of the invention is con-l cerned the door or closure may be of any type and mounted in any preferred way. The force for operating the door may be derived from any prime mover, so long as the power developed is constant. The gist of the invention resides in means whereby the constant force is applied lto effect ,a variable movement of the door, both in its opening and closing movements, the initial movement of the door being slow, thenjaccelerated and finally Vretarded' to bring the door to rest by a gentle movement without any lappreciable impact or jar.

I-Iaving thus claim:r

1. The combination with a structure having a door opening, and a guide on the structure opposite the door opening and inclined to the plane thereof, of a closurerfor the dooropening including a main leaf hinged tothe structure and a supplemental leaf hinged to the Y y main leaf, a lever rotatable at a constant speed, a link'connecting the lever with the described the invention, I

main leaf and an element slidable on the said Y guide and connected withthe supplemental loaf by means of'a swivel joint.

2. The combination with a structure having a door opening, and a guide on the struc-V ture opposite` the door opening, and inclined yto the plane thereof, of main leaves hinged JOHN ii.' PETERSEN, [mi

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